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If veca=hati -2 hatj + 3 hatk if vecb is...

If `veca=hati -2 hatj + 3 hatk if vecb` is a vector such that `veca.vecb=|vecb| and |veca-vecb|=sqrt7,` then `|vecb|=`

A

`7`

B

`14`

C

`sqrt7`

D

`21.`

Text Solution

Verified by Experts

The correct Answer is:
C
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